Home / 15,788.12-21,787.04-9,499.28

Finding the Fourth Proportional to 15,788.12, 21,787.04 and 9,499.28

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Solution

The fourth proportional to 15,788.12, 21,787.04 and 9,499.28 is: 13,108.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,788.12 : 21,787.04 = 9,499.28 : x
  2. Step 2: Convert to fraction form
    15,788.12/21,787.04 = 9,499.28/x
  3. Step 3: Cross multiply
    15,788.12x = 21,787.04 × 9,499.28
  4. Step 4: Simplify right side
    15,788.12x = 206,961,108.14
  5. Step 5: Solve for x
    x = 206,961,108.14/15,788.12
  6. Step 6: Final answer
    x = 13,108.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.